539021 ÷ 28 
The aim is to understand the frequency of 28 in 539021.

Advancing to step 1:
If we divide 5 by 28, we get 0 and a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Include the next digit (3) from the dividend after 5, then repeat: 53 / 28

Advancing to step 2:
28 can be fit into 53 1 times, resulting in a remainder of 25.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 25 after subtracting 28 from 53.
Take the next digit (9) from the dividend and append it to 25, then repeat: 259 / 28

Going ahead to step 3:
The number 28 fits into 259 9 times, leaving a remainder of 7.
Use 9 as the next digit of our solution. 
Result so far: 19.0
Subtracting 252 from 259 leaves us with 7.
Fetch the next digit (0) from the dividend, attach it to 7 and continue: 70 / 28

Moving on to step 4:
28 goes into 70 2 times with a remainder of 14.
Record the quotient 2 as the next digit in the result. 
Result so far: 192.0
If we take 56 away from 70, we end up with 14.
Append the next digit (2) from the dividend to 14 and continue with: 142 / 28

Going ahead to step 5:
When dividing 142 by 28, we get 5 with a remainder of 2.
Write down 5 as next digit of the result. 
Result so far: 1925.0
Deduct 140 from 142 and we're left with 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 28

Going ahead to step 6:
28 can be fit into 21 0 times, resulting in a remainder of 21.
Write down 0 as next digit of the result. 
Result so far: 19250.0
Subtracting 0 from 21 leaves us with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Advancing to step 7:
28 goes into 210 7 times with a remainder of 14.
Put 7 as the next digit of the answer. 
Result so far: 19250.7
Subtracting 196 from 210 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 8:
The number 28 fits into 140 5 times, leaving a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 19250.75
If we take 140 away from 140, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 9:
28 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 19250.75
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 10:
28 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 19250.75
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 19250.75 with a remainder of 0.0.